Publication Insights

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  AtaGenix Helps Uncover the Wave-like Transcriptional Regulatory Mechanism of the Archaeal Cell Cycle

  Although the Sulfolobales cell cycle mirrors the eukaryotic G1-S-G2-M-D structure, the transcriptional logic governing its phase transitions has remained unclear. This study identifies three RHH-domain transcription factors, aCcr1, aCcr2, and aCcr3, that cooperatively control progression in Saccharolobus islandicus. The constitutively expressed aCcr2 broadly represses cell division and replication genes until aCcrK phosphorylates it near the end of G2, releasing this repression and opening a window for cells to enter M phase. The periodically expressed aCcr1 and aCcr3, which bind the same target promoters with higher affinity, then re-establish repression at the M/G1 and G1/S transitions, creating sequential "braking points." This wave-like repression-derepression-rerepression mechanism, built on differential promoter affinities and a single phosphorylation switch, offers a simplified model for how transcriptional timing can govern cell cycle checkpoints, with implications for understanding the evolutionary origins of eukaryotic cycle control.
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  CDK1-RNF40-PLK1 Signaling Cascade Regulates Centrosome Maturation via Acetylation-Phosphorylation Switch

  A recent study published in Nature Communications reveals that the ubiquitin E3 ligase RNF40 serves as a key temporal regulator of centrosome maturation. RNF40 is phosphorylated by CDK1 at T529 and T557 during G2/M phase, enabling direct recruitment of PLK1 to centrosomes. This phosphorylation is antagonized by PCAF-mediated acetylation in interphase and activated by HDAC1-mediated deacetylation, forming a dynamic “acetylation-phosphorylation switch” that precisely controls the timing of centrosome maturation, microtubule nucleation, and chromosome segregation. Disruption of this mechanism leads to chromosomal instability and tumorigenesis, highlighting RNF40 as a potential therapeutic target in cancer.
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  AtaGenix Co-Developed Tau368 Antibody Empowers Discovery: Calbindin-D28k Loss Mediates Tau-Driven Hippocampal Hyperexcitability and Cognitive Impairment

  A research team at Zhongnan Hospital of Wuhan University, publishing in Translational Neurodegeneration, has uncovered the molecular mechanism by which Tau pathology drives neuronal hyperexcitability in Alzheimer's disease (AD). Using an inducible transgenic mouse model, the study demonstrates that truncated human Tau (hTau368) selectively accumulates in excitatory neurons of the hippocampal CA1 and DG regions, leading to downregulation of the calcium-binding protein Calbindin-D28k (CB). This loss of CB impairs intracellular calcium buffering, resulting in synaptic dysfunction, elevated neuronal excitability, and increased seizure susceptibility, ultimately producing significant spatial memory deficits. AAV-mediated CB overexpression effectively reversed these electrophysiological abnormalities, suppressed neuroinflammation, and restored cognitive function. Analysis of AD patient databases further confirmed that CB expression declines progressively with worsening CDR scores and Braak staging. The Tau368 antibody co-developed by AtaGenix was instrumental in enabling precise pTau detection throughout this work.
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  AtaGenix Xten™ Mab Single B Cell Technology Facilitates the Dynamic Mechanism of Innate Immunity in Duck Hepatitis

  Researchers from the Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, utilized primary Peking duck hepatocytes to systematically dissect the dynamic regulation of type I interferons (IFN-α/β) and eight key innate immune molecules during DHAV-3 infection. The study revealed that IFIH1 consistently suppresses viral replication throughout the infection cycle, whereas IRF7 and MAVS exhibit stage-specific roles: antiviral in early and late phases, but potentially hijacked by the virus in mid-phase to drive inflammation. This work demonstrates how the host achieves a temporal balance between antiviral defense and prevention of immunopathology through precise signaling switches, providing critical insights into immune evasion mechanisms of duck viral hepatitis and novel control strategies. High-specificity rabbit monoclonal antibodies for IFN-α/β, developed via AtaGenix’s Xten™ Mab single-B platform, ensured accurate protein-level validation.
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  Cell Discovery: Endosymbiotic Bacteria Build Intricate "Sugar Networks" Inside Insects to Fuel Mutual Survival

  Nutritional endosymbiosis plays a core role in biological adaptation and evolution, but its nutrient transfer mechanism remains unclear. Using the rice weevil (Sitophilus oryzae) and its endosymbiont Sodalis pierantonius as a model, this study combined high-pressure freezing, volume electron microscopy, and in-situ high-resolution chemical analysis. It was found that the endosymbiont can actively construct a complex tubular membrane network (tubenets), which originates from the bacterial outer membrane, persists throughout the insect's life cycle, and is rich in carbohydrates together with host vesicles. By expanding the contact interface between bacteria and the host cytoplasm, tubenets form a synergistic channel with host vesicles to efficiently uptake host carbohydrates, supporting bacterial growth and the synthesis of amino acids required by the host. This discovery reveals a unique nutrient acquisition strategy of bacteria in intracellular symbiosis, providing key insights into the metabolic exchange mechanism of endosymbiotic relationships.
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  AtaGenix Custom Antibodies Unlock the T6SS Co-Secretion Mechanism in Gut Commensal Bacteria: BtapC Fuels Competitive Advantage

  This study elucidates the molecular mechanism by which Bacteroides fragilis GS086 employs its Type VI Secretion System (T6SS) to co-secrete two effector proteins, BtpeA and BtaeB, coordinated by the adaptor protein BtapC. Through cryo-EM analysis, the quaternary complex VgrG–BtpeA–BtaeB–BtapC was resolved at 3.06 Å, revealing a sophisticated assembly where BtapC stabilizes the complex, and a unique BtaeB loop acts as a structural checkpoint for synchronous secretion. These effectors synergistically disrupt bacterial cell walls, enhancing competitive fitness in the gut microbiota. The findings highlight a conserved co-secretion mechanism in Bacteroidota, offering insights into microbial competition and potential applications in microbiome-targeted interventions.
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  AtaGenix Anti-PCK1 pS90 Antibody Aids in Overcoming AKT Hyperactivation-Mediated Chemoresistance in Intrahepatic Cholangiocarcinoma (ICC)

  This study reveals that AKT-hyperactivated ICC resists chemo-immunotherapy via the pPCK1-pLDHA-SPRINGlac axis, which activates the mevalonate pathway to inhibit ferroptosis. Simvastatin was found to reverse this resistance. The anti-PCK1 pS90 antibody from AtaGenix was a key tool in validating this mechanism.
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  AtaGenix supports research on spleen-targeting NeoPol-mL242 mRNA vaccine

  Research supported by AtaGenix Laboratories has developed the spleen-targeting NeoPol-mL242 mRNA vaccine, utilizing the optimized L242-20Lipo delivery system to achieve efficient dendritic cell activation and robust anti-tumor immunity. This innovative approach significantly reduces hepatotoxicity while effectively inhibiting tumor growth in hepatocellular carcinoma (HCC) and melanoma models. By leveraging spleen-selective lipid nanoparticles (LNPs) and neoantigen-specific T-cell responses, the vaccine demonstrates remarkable efficacy in reducing tumor burden and prolonging survival, offering a promising new direction for cancer immunotherapy.
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  AtaGenix Custom Lactylation Antibody Facilitates the Elucidation of the BASP1-AS1–PCBP2 Axis, Uncovering a Novel Mechanism of Oxaliplatin Resistance in Gastric Cancer

  Gastric cancer (GC) is the fifth most common malignancy and the fourth leading cause of cancer-related deaths worldwide, with oxaliplatin (OXA) resistance posing a major therapeutic challenge. A research team from Jiangnan University Affiliated Hospital, supported by AtaGenix, published a study in Free Radical Biology and Medicine, integrating multi-omics and organoid models. The study reveals that LncRNA BASP1-AS1 recruits the ULK1/LDHA complex to enhance glycolysis and lactate production, inducing PCBP2 K115 lactylation (PCBP2K115la). This modification blocks PCBP2 interaction with ARIH2, inhibiting ubiquitination and stabilizing PCBP2, while histone H3K14la transcriptionally activates LDHA/PCBP2, forming a self-amplifying metabolic-epigenetic loop. This axis suppresses ferroptosis, sustaining OXA resistance, and highlights the BASP1-AS1–PCBP2 pathway as a key mechanism and potential therapeutic target for overcoming GC chemoresistance. AtaGenix’s custom anti-PCBP2K115la antibody enabled precise detection of lactylation dynamics.
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  AtaGenix Facilitates Unraveling the Molecular Mechanism of PAD1 Regulating Ovarian Cancer Stem Cell Characteristics and Drug Resistance via AKT2 Citrullination

  A research team from China Medical University published a study in Advanced Science, elucidating the critical role of protein arginine deiminase family member PAD1 in maintaining ovarian cancer stem cell (OCSLC) characteristics and drug resistance. The study found that PAD1 is significantly upregulated in ovarian cancer tissues, correlating with malignant phenotypes and stemness. PAD1 specifically interacts with AKT2, catalyzing its citrullination at the R202 site, thereby activating the PI3K/AKT signaling pathway and upregulating the transcription factor CEBPβ to promote the expression of stemness marker genes. Inhibiting PAD1 reduces AKT2 phosphorylation and citrullination, reversing stemness features and cisplatin resistance, with synergistic effects when combined with AKT inhibitors. The site-specific AKT2-Cit202 monoclonal antibody provided by AtaGenix played a pivotal role in validating this mechanism, offering new insights into potential therapeutic targets for ovarian cancer.